The Characteristics of UV Strength According to Corona Discharge From Polymer Insulators Using a UV Sensor and Optic Lens

Kim, Young-Seok; Shong, Kil-Mok

doi:10.1109/tpwrd.2011.2131689

Cited by 48 publications

(22 citation statements)

References 2 publications

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“…Water conductivity measured by DD-810E. Forming condition of glaze in chamber is shown in Table 2, where d a is droplet diameter, W is absolute humidity, T a is temperature and γ 20 is conductivity in 20 o C. As the major extent of spectra produced by corona discharge is in invisible ultraviolet region, CoroCam IV+ ultraviolet imager [23] is used to observe the development of corona discharge, because there exist an obvious relationship between photon numbers and COV [24,25], measuring devices and test arrangement are shown in Figures 4 and 5 respectively. …”

Section: Expeimental Specimensmentioning

confidence: 99%

Study on the influence of charged glaze on the corona onset voltage of bundle conductor

Chen

Jiang

Shu

et al. 2014

IEEE Trans. Dielect. Electr. Insul.

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Glaze grows on the conductor surface will affect corona onset voltage (COV). Wires iced under voltage is often neglected and scaled models always adopted to study the actual bundle conductors, there is no lights have been thrown into the downtrend of COV during charged icing. AC corona tests of iced bundle conductors implemented in the Multifunction Climate Chamber, the UV imaging camera and I-U curve fitting applied to analyze the COV. Finite element models of iced conductor established to discuss how the glaze icicles affect electric field. Results show that glaze cut the COV down greatly. Different icicle morphology leads to distinct COV values. With more sub-conductors, bundle conductor gets higher COV in the same icing time. With the Increase of icing time, COV decreases with the rate slow down. Higher conductivity has no effect on morphology but reduces the COV. Sharper icicles lead to more seriously field distorted and lower COV values. This paper provides reference for selection and designation of transmission line in glaze icing areas.

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Section: Expeimental Specimensmentioning

confidence: 99%

Study on the influence of charged glaze on the corona onset voltage of bundle conductor

Chen

Jiang

Shu

et al. 2014

IEEE Trans. Dielect. Electr. Insul.

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“…That is to say the effect of sunlight can be excluded during corona and arc discharge detection by UV imaging. Given its advantages, UV imaging has been widely applied and studied worldwide [11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Factors on Electrical Equipment UV Corona Discharge Detection

Jiang

et al. 2016

Energies

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Abstract:As a non-contact discharge detection method, ultraviolet (UV) imaging can rapidly, directly, and securely detect corona discharges. Therefore, UV imaging has been widely applied to power systems. To study the influences of different factors on UV corona discharge detection, two typical types of UV imagers (DayCor ® Superb and CoroCAM ® 6D) were utilized. Results show that the observation angle has little impact on UV detection if no obstacles block the detection line of sight. Given that different UV imagers have different optimal imager gains, photon numbers under different gains could be calibrated to the values under optimal gains in accordance with the gain correction formula. Photon numbers decrease with the increase in the square of observation distance. Detection results under different observation distances could be corrected to the contrast distance after the detection of electrical equipment. The photon numbers of different UV imager types could be corrected in accordance with the instrumental correction factor. The results of this study can provide references to improve the applications and standardizations of UV imaging technology in corona discharge detection.

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“…With the rapid development of extra high-voltage transmission lines, a corona discharge in air has become one of the critical problems, which leads to deterioration of insulation systems, power loses, radio noises, etc. [2,3]. In the meantime, corona discharge has been employed as an effective tool in many industrial applications such as electrostatic precipitators, disinfection, ozone generators, surface treatment, ignition, and electrostatic painting [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Space and Time Domain Finite Volume Method for Numerical Simulation of Negative Corona Discharge in Air

Wang¹

2016

Journal of Electrical Engineering and Technology

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-In this paper, a space and time domain finite volume method is proposed to study the characteristics of space charges on a bar-to-plate geometry. Three ionic species, namely, positive ions, negative ions, and electrons, are considered. A finite element method is used to solve Poisson's equation, and a finite volume method is used to solve charge transport equation. Different time steps based on space domain and time domain are applied to improve computational efficiency when solving the charge transport equation. Four points are marked to indicate the characteristics of a Trichel pulse. Density distributions of three ionic species and electrical field strength along the axis are presented. Trichel pulses on a bar-to-plate geometry are simulated and compared with the experimental results. Good agreements are obtained, thereby confirming the validity of the proposed method.

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The Characteristics of UV Strength According to Corona Discharge From Polymer Insulators Using a UV Sensor and Optic Lens

Cited by 48 publications

References 2 publications

Study on the influence of charged glaze on the corona onset voltage of bundle conductor

Study on the influence of charged glaze on the corona onset voltage of bundle conductor

Effects of Different Factors on Electrical Equipment UV Corona Discharge Detection

Space and Time Domain Finite Volume Method for Numerical Simulation of Negative Corona Discharge in Air

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